"It’s a states right argument that gets used in times of great controversy," Kaine said. "The president is acting by executive power that is legally conferred on him. And as you pointed out, you went over these executive orders. They’re basic, common sense things mostly geared around information."

O'Brien tried again to clarify. "Right, but when you say nullify is a 'code word,' usually there's some end game to the code," she said. "So what's being said?"

"We’ll see what it is," Kaine said. "But the notion that we’re going to nullify a presidential action when the President is acting pursuant to law, you know, that’s just kind of this anti-government rhetoric that I’m surprised to hear somebody in government using." Watch the video below:

Paul, the first-term Kentucky senator who may have presidential ambitions, told Fox News host Sean Hannity Wednesday night that he would look into nullifying "anything the president does that smacks of legislation."

After explaining his belief that President Obama may have overreached executive authority, Paul argued that Obama would not be able to pass meaningful gun control legislation through Congress. “I think there are a few Democrats that will worry about going home to West Virginia or other states like that and voting for a ban on guns,” he said. “So, I think there is a good chance we can stop his legislative action. I’m concerned he will try to do the regulatory fiat, what he can’t pass through legislation."

Democrat Tim Kaine is the winner of the hotly contested Senate race in Virginia, CBS News projects. Kaine, a former governor, faced another former governor and former senator, Republican George Allen. Allen lost this Senate seat in 2006 to Democrat Jim Webb, who chose not to run for reelection.

Crossroads GPS has two new ads running in Virginia focused on Democratic Senate candidate Tim Kaine's liberal record. In one ad, the conservative super PAC knocks Kaine for supporting the budget sequestration plan, increasing government spending, and "higher taxes on middle class families"--tying all of these positions to Barack Obama, too. Watch the ad below:

To beat Kaine?

If closing the deficit is the goal.

Fairfax, Va.Democratic Senate candidate Tim Kaine of Virginia is touting his tax plan as a "compromise" between both sides of the aisle. Rather than extend the current tax rates for everyone, which Republicans support, or let some of those cuts expire and raise taxes on those making over $250,000 a year, which Democrats support, Kaine proposes letting the tax cuts expire on income over $500,000.

"There's no theology or magic to that number," Kaine told a crowd of 40 at an event in Northern Virginia Wednesday morning. "But it's a number that is a compromise."

Richmond, Va.Speaking to reporters following his second televised debate against Republican George Allen Monday night, Democratic Senate candidate Tim Kaine of Virginia was asked if he would vote for Harry Reid, currently the majority leader, for the Democrats' top position in the U.S. Senate. Kaine refused to answer the question.

As Tim Kaine opens up a small lead in the race for the open Senate seat in Virginia, both the former Democratic governor and his Republican opponent, former governor and senator George Allen, face off in their second debate Monday night in Richmond. Both candidates' latest TV advertisements may hint at the different strategies going into the debate and the final weeks of the campaign in what still remains a toss-up race in an important swing state.

"A storm is coming."

Republican Senate candidate George Allen has a new TV ad telling Virginia voters that the cuts coming to the Defense Department as a result of the budget sequestration will be "devastating" to the Old Dominion and its economy. Watch the ad below:

New trend or outlier?

A new poll from We Ask America shows Mitt Romney leading Barack Obama in Virginia, a key swing state Obama won in 2008. Of the 1,106 likely voters in Virginia polled, 48 percent support Romney, with just over 43 percent supporting Obama and nearly 9 percent remaining undecided.

Richmond, VirginiaOn Tuesday, George Allen, the former governor of Virginia, won the Republican nomination to run for the U.S. Senate seat he once held. Allen won 65 percent of the vote, running far ahead of his closest challenger, Tea Party activist Jamie Radtke. Calling himself the "common sense conservative nominee of the Republican party," Allen spoke to a small crowd of supporters at the Westin hotel in Richmond's West End.

Ashburn, Va.Governor Bob McDonnell heaped praise Monday on George Allen as the two campaigned together the day before Tuesday’s GOP primary. “This is a man who was, I believe, the greatest reform governor of the modern era in Virginia,” said McDonnell alongside Allen to a crowd of Republicans gathered at Prototype Productions Incorporated, a small business just north of Dulles International Airport, touting the latter’s own record as governor on jobs and innovation.